Siemens SINAMICS S 1PH7 - 7.8 Vibration Stressing

Information for using the motors
7.8 Vibration stressing
1PH7 induction motors (Machine tools)
Configuration Manual, (APH7W), 04/2009, 6SN1197-0AD72-0BP0
231
7.8 7.8 Vibration stressing
External vibrations are introduced into the motor through the motor foundation and/or the
drive mechanical transmission through the motor frame and/or through the rotor. In order to
ensure perfect functioning of the drive as well as a long motor lifetime, these types of
vibrations, introduced into the drive system, should not exceed the specific limit values of the
motor.
Vibration caused by the rotor must be minimized by appropriately balancing the motor.
Table 7- 5 Vibration values for SH 100 to 160
1)
Vibration frequency Vibration values
< 6.3 Hz Vibration displacement s ≤ 0.16 mm
6.3 ... 250 Hz Vibration velocity v
rms
≤ 4.5 mm/s
> 250 Hz Vibration acceleration a ≤ 2.55 m/s
2
Table 7- 6 Vibration values for SH 180 to 225
1)
Vibration frequency Vibration values
< 6.3 Hz Vibration displacement s ≤ 0.25 mm
6.3 ... 63 Hz Vibration velocity v
rms
≤ 5.0 mm/s
> 63 Hz Vibration acceleration a ≤ 4.0 m/s
2
To ensure problem-free operation and a long service life, the vibration values specified to
ISO 10816 must not be exceeded at the defined measuring points on the motor.
Table 7- 7 Max. permissible radial and axial vibration values
1)
Vibration velocity V
rms
[mm/s] Vibration acceleration a
peak
[m/s
2
]
4.5 10 radial
4.5 2.25 axial
1) Both values must be observed simultaneously
To measure the vibration velocity, the measuring equipment must fulfill the requirements of
ISO 2954. The vibration acceleration must be measured as a peak value in the time range in
a frequency band of 10 to 2000 Hz.
If appreciable vibration excitation in excess of 2000 Hz (e.g. gear teeth meshing frequencies)
can be expected, the measurement range must be adapted accordingly. This does not alter
the maximum permissible values.
Note
Uninterrupted duty within the natural frequencies
Uninterrupted duty in the natural frequencies of the installed/mounted system must be
avoided, as this generally leads to the permissible vibration values being exceeded and the
system being damaged. To reduce vibration, the flanged-mounted motors can be supported
at the NDE.